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Mon, 09 Nov 2026 09:17:41 -0800 (PST) Received: from torstein-desktop.internal ([2a01:799:3a1:9700:9811:d134:cbdf:c22b]) by smtp.googlemail.com with ESMTPSA id a640c23a62f3a-c4d6a4af091sm191633866b.50.2026.11.09.09.17.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 09 Nov 2026 09:17:40 -0800 (PST) Sender: Torstein Eide From: Torstein Eide To: Jiri Kosina , Benjamin Tissoires Cc: Hans de Goede , Maoyi Xie , linux-input@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 0/2] HID: lg-g15: G15 v2 contrast and game-mode LEDs Date: Mon, 9 Nov 2026 18:17:25 +0100 Message-ID: <20261109171727.2812614-1-torsteine+linux@gmail.com> X-Mailer: git-send-email 2.53.0 X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit This series adds two LEDs for the Logitech G15 v2 to hid-lg-g15. Patch 1 exposes the GamePanel LCD contrast as a g15::lcd_contrast LED. Patch 2 binds the G15 v2's keyboard device (046D:C226), which is currently handled by hid-generic, and exposes the Super-key-lock ("Game Mode") state as a read-only g15::game_mode LED. Normal key input on that device is left to hid-input, with the same HID_QUIRK_INPUT_PER_APP setup hid-generic uses. Tested on a Logitech G15 v2, together with lcdproc (g15 driver, hidraw mode) driving the LCD: the LCD output, the contrast LED and the L1-L5 keys all keep working, and the c226 input devices have the same names as under hid-generic. Also tested across a suspend/resume cycle. Changes in v2: - Drop the framebuffer patch; userspace (lcdproc, libg15) drives the LCD through hidraw instead. - Drop the remove-path patch: hid-core holds driver_input_lock during remove(), so raw_event cannot reschedule the work. - Contrast LED: clamp the brightness before indexing contrast_values[], and restore the contrast on resume under g15->mutex. - Game-mode LED: set HID_QUIRK_INPUT_PER_APP like hid-generic, read the initial lock state before registering the LED, and guard the cached state with a spinlock so a resume-time GET_REPORT cannot overwrite a newer input report. Torstein Eide (2): HID: lg-g15: add LCD contrast LED HID: lg-g15: report Super-key-lock state on G15 v2's keyboard interface drivers/hid/hid-ids.h | 1 + drivers/hid/hid-lg-g15.c | 347 ++++++++++++++++++++++++++++++++++++++- 2 files changed, 343 insertions(+), 5 deletions(-) base-commit: 2c2fe95ab19b09bef7391e3e5cdf8146d09792b6 -- 2.53.0